/Engine/Plugins/MovieScene/MovieRenderPipeline/Source/MovieRenderPipelineCore/Public/Graph/MovieGraphPipeline.h
virtual const [TSet](API\Runtime\Core\Containers\TSet)< [TObjectPtr](API\Runtime\Core\Delegates\TObjectPtr)< [UMovieGraphFileOutputNode](API\Plugins\MovieRenderPipelineCore\Graph\Nodes\UMovieGraphFileOutputNode) > > GetOutputNodesUsed() const